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train/600 | What is the name of the colony shown? | [
"Florida",
"Washington, D.C.",
"South Carolina",
"Maryland"
] | 3 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/601 | Which property do these four objects have in common? | [
"opaque",
"sweet",
"fragile"
] | 0 | Select the best answer. | closed choice | grade5 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
Sugar has a sweet taste. The flute is not sweet.
A fragile object will break into pieces if you drop it. The paper notebook is not fragile.
An opaque object does not let light through. All four objects are opaque.
The property that all four objects h... |
train/602 | Which term matches the picture? | [
"exothermic process",
"endothermic process"
] | 0 | Read the text.
An endothermic process is a chemical process that absorbs energy in the form of heat. Frying an egg involves an endothermic process, as the egg absorbs heat energy from the frying pan. Any chemical process in which a substance takes heat from the surrounding environment is endothermic.
An exothermic proc... | closed choice | grade8 | language science | word-study | Domain-specific vocabulary | Determine the meaning of domain-specific words with pictures | A candle burning is an exothermic process. It releases heat and smoke into the environment. | |
train/603 | Which property do these three objects have in common? | [
"flexible",
"opaque",
"translucent"
] | 2 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
An opaque object does not let light through. None of the objects are opaque.
A translucent object lets light through. But you cannot see clearly through a translucent object. All three objects are translucent.
A flexible object can be folded or bent ... |
train/604 | Which material is this arrowhead made of? | [
"wool",
"rock"
] | 1 | closed choice | grade3 | natural science | physics | Materials | Identify materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials. | Look at the picture of the arrowhead.
The arrowhead is made of rock.
Many arrowheads are made of obsidian. Obsidian is a type of rock. It is made when lava from a volcano cools quickly. | |
train/605 | What can Lamar and Jennifer trade to each get what they want? | [
"Lamar can trade his tomatoes for Jennifer's broccoli.",
"Lamar can trade his tomatoes for Jennifer's carrots.",
"Jennifer can trade her broccoli for Lamar's oranges.",
"Jennifer can trade her almonds for Lamar's tomatoes."
] | 0 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Lamar and Jennifer open their lunch boxes in the school cafeteria. Neither Lamar nor Jennifer got everything that they wanted. Th... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Lamar wants broccoli. Jennifer wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | |
train/606 | What can Jaden and Nicole trade to each get what they want? | [
"Jaden can trade his tomatoes for Nicole's carrots.",
"Jaden can trade his tomatoes for Nicole's broccoli.",
"Nicole can trade her broccoli for Jaden's oranges.",
"Nicole can trade her almonds for Jaden's tomatoes."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Jaden and Nicole open their lunch boxes in the school cafeteria. Neither Jaden nor Nicole got everything that they wanted. The ta... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Jaden wants broccoli. Nicole wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | |
train/607 | What is the direction of this push? | [
"away from the man's hands",
"toward the man's hands"
] | 0 | A man pushes his team's soapbox car with his hands. The car begins to roll forward. | closed choice | grade2 | natural science | physics | Force and motion | Identify pushes and pulls | One object can make another object move with a push or a pull.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The man pushes the soapbox car away from himself. So, the car begins to roll. The direction of the push is away from the man's hands. |
train/608 | Which better describes the Monongahela National Forest ecosystem? | [
"It has cold, wet winters. It also has soil that is rich in nutrients.",
"It has soil that is poor in nutrients. It also has only a few types of trees."
] | 0 | Figure: Monongahela National Forest.
The Monongahela National Forest is a temperate deciduous forest ecosystem in eastern West Virginia. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A temperate deciduous forest is a type of ecosystem. Temperate deciduous forests have the following features: warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees. So, the Monongahela National Forest has cold, wet winters. It also has soil that is rich in nutrients. |
train/609 | Select the organism in the same species as the Victoria crowned pigeon. | [
"Cyanocitta cristata",
"Goura victoria",
"Strix nebulosa"
] | 1 | This organism is a Victoria crowned pigeon. Its scientific name is Goura victoria. | closed choice | grade4 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A Victoria crowned pigeon's scientific name is Goura victoria.
Strix nebulosa does not have the same scientific name as a Victoria crowned pigeon. So, Goura victoria and Strix nebulosa are not in the same species.
Cyanocitta cristata does not have the same scientific name as a Victoria crowned pigeon. So, Goura victori... |
train/610 | Which property matches this object? | [
"salty",
"fuzzy"
] | 1 | Select the better answer. | closed choice | grade3 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. | Look at the object.
Think about each property.
A fuzzy object is covered in soft hair. The kiwi is fuzzy.
Potato chips have a salty taste. The kiwi is not salty. |
train/611 | Which animal's skin is better adapted as a warning sign to ward off predators? | [
"fire salamander",
"fantastic leaf-tailed gecko"
] | 0 | Opalescent nudibranchs have stinging cells in their brightly colored skin. The bright colors serve as a warning sign that the animal is toxic and dangerous. The 's skin is adapted to ward off predators.
Figure: opalescent nudibranch. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the opalescent nudibranch.
The opalescent nudibranch has stinging cells in its brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the opalescent nudibranch is toxic and dangerous.
Now look at each animal. Figure out which animal has a ... |
train/612 | Which animal is also adapted to use its neck to appear large and scary to a predator? | [
"bearded dragon",
"sand lizard"
] | 0 | Frillneck lizards are reptiles. Their predators include owls, eagles, and snakes. The lizard uses its neck to appear large and scary to a predator.
Figure: frillneck lizard. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's neck is one example of an adaptation. Animals' necks can be adapted in different ways. For example, a large frilled neck might help an animal appear dangerous ... | Look at the picture of the frillneck lizard.
When frightened, the frillneck lizard can spread out its frill to appear larger and more dangerous. If a predator is nearby, the frill can help scare it away.
Now look at each animal. Figure out which animal has a similar adaptation.
The bearded dragon has spiny scales aroun... |
train/613 | Which property matches this object? | [
"sour",
"sticky"
] | 1 | Select the better answer. | closed choice | grade3 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. | Look at the object.
Think about each property.
A lemon has a sour taste. The honey is not sour.
A sticky object can attach or stick to other things. The honey is sticky. |
train/614 | What is the capital of Alaska? | [
"Boston",
"Sacramento",
"Fairbanks",
"Juneau"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Juneau is the capital of Alaska. | ||
train/615 | Which solution has a higher concentration of blue particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each blue ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/616 | Which ocean is highlighted? | [
"the Pacific Ocean",
"the Indian Ocean",
"the Southern Ocean",
"the Atlantic Ocean"
] | 0 | closed choice | grade8 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Pacific Ocean. | |
train/617 | Is thread a solid, a liquid, or a gas? | [
"a gas",
"a liquid",
"a solid"
] | 2 | closed choice | grade3 | natural science | physics | States of matter | Classify matter as solid, liquid, or gas | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own.
Some solids can be easily folded, bent, or broken. A piece of paper is a... | Thread is a solid that can be bent or tangled. But it still has a size and shape of its own. | |
train/618 | Which of these continents does the prime meridian intersect? | [
"Antarctica",
"Asia",
"North America"
] | 0 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects Antarctica. It does not intersect Asia or North America. | |
train/619 | Which material is this bicycle tire made of? | [
"porcelain",
"metal"
] | 1 | closed choice | grade2 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the bicycle tire.
The bicycle tire is made of two different materials. The rim and spokes are made of metal. The rest of the tire is made of rubber. | |
train/620 | Complete the sentence.
Arctic foxes use their tails to (). | [
"hide food",
"keep warm",
"move around"
] | 1 | Read the first part of the passage about arctic foxes.
Arctic foxes live in very cold places. Their fur coats keep them warm.
Their tails help keep them warm, too. These foxes have big, bushy tails. They put their tails around their bodies when they go to sleep. | closed choice | grade1 | language science | reading-comprehension | Read-alone texts | Read passages about animals | The passage says the foxes put their tails around their bodies when they go to sleep. It also says the tails help keep them warm. | |
train/621 | Identify the question that Darnell's experiment can best answer. | [
"Can pennies hold more drops of water mixed with dish soap or water mixed with hand soap?",
"Can pennies hold more drops of pure water or water mixed with hand soap?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Darnell used a dropper to put equal-sized drops of pure water, one at a time, onto a penny. The drops stayed together and formed a dome on the penny's surface. Darnell recorded the number of drops he could add before th... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/622 | Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the right than to the left",
"to the left than to the right"
] | 1 | The diagram below shows a solution with one solute. Each solute particle is represented by a purple ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 3 solute particles on the left side of the membrane and 5 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... |
train/623 | What is the capital of South Dakota? | [
"Sioux Falls",
"Rapid City",
"Bismarck",
"Pierre"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | ||
train/624 | Which animal's skin is better adapted as a warning sign to ward off predators? | [
"sharpnose-puffer",
"peppered moth"
] | 0 | s have stinging cells in their brightly colored skin. The bright colors serve as a warning sign that the animal is toxic and dangerous. The 's skin is adapted to ward off predators.
Figure: Spanish shawl nudibranch. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the Spanish shawl nudibranch.
The Spanish shawl nudibranch has stinging cells in its brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the Spanish shawl nudibranch is toxic and dangerous.
Now look at each animal. Figure out which anim... |
train/625 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The smaller the magnets, the smaller the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is smaller in Pair 1 than in Pair 2. So, the magnit... |
train/626 | Look at the models of molecules below. Select the elementary substance. | [
"silane",
"ethane",
"chlorine"
] | 2 | closed choice | grade6 | natural science | chemistry | Atoms and molecules | Identify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | ||
train/627 | Which two months have the same average temperature in Portland? | [
"July and August",
"April and May",
"September and October"
] | 0 | Use the graph to answer the question below. | closed choice | grade4 | natural science | earth-science | Weather and climate | Use climate data to make predictions | To describe the average temperature trends in Portland, look at the graph.
Choice "Apr" is incorrect.
Choice "May" is incorrect.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Out of all the answer choices, only July and August have the same average temperatu... | |
train/628 | What is the capital of Massachusetts? | [
"Concord",
"Cambridge",
"Boston",
"Missoula"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Boston is the capital of Massachusetts. | ||
train/629 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/630 | What are rays? | [
"Rays are birds that swim in the water.",
"Rays are fish that do not have fins.",
"Rays are fish that are shaped like kites."
] | 2 | Read the first part of the passage about rays.
Rays are a kind of fish. But they do not look like other fish. Most rays are shaped like big, flat kites.
Rays have great big fins that look like wings. The fins help rays swim. Rays look like birds flying in the water. | closed choice | grade1 | language science | reading-comprehension | Read-alone texts | Read passages about animals | The passage says that rays are a kind of fish. It also says most rays are shaped like big, flat kites. So, rays are fish that are shaped like kites. | |
train/631 | Which bird's beak is also adapted to get nectar out of long flowers? | [
"puffin",
"purple honeycreeper"
] | 1 | Bronzy sunbirds live in the coastal and hilly areas of Southern Africa. The shape of the 's beak is adapted to get nectar out of long flowers.
Figure: bronzy sunbird. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the bronzy sunbird.
The bronzy sunbird has a long, thin beak. Its beak is adapted to get nectar out of long flowers. The bronzy sunbird's long, thin beak can reach deep into the flowers.
Now look at each bird. Figure out which bird has a similar adaptation.
The purple honeycreeper has a long, thi... |
train/632 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample A",
"sample B"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in sample B has more mass than each particle in sample A. The particles in sample B also have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average ... |
train/633 | Which country is highlighted? | [
"Papua New Guinea",
"New Zealand",
"Solomon Islands",
"Australia"
] | 3 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Australia.
Is Australia a country or a continent?
Both! Australia is a country in Oceania, a region made up of many lands and islands in the Pacific Ocean. Many people say that Australia is the world's smallest continent. But some people call Oceania a continent instead. | ||
train/634 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade3 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. |
train/635 | What is the capital of Louisiana? | [
"Baton Rouge",
"Austin",
"Boston",
"Nampa"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Baton Rouge is the capital of Louisiana. | ||
train/636 | What is the name of the colony shown? | [
"Maine",
"Massachusetts",
"Alabama",
"Virginia"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Virginia.
The Virginia Colony included land that would later become part of the state of West Virginia. West Virginia was never its own colony. | ||
train/637 | What is the capital of Vermont? | [
"Montpelier",
"Trenton",
"Providence",
"Albany"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Montpelier is the capital of Vermont. | ||
train/638 | Which animal's limbs are also adapted for climbing trees? | [
"California sea lion",
"chimpanzee"
] | 1 | White-cheeked gibbons live in the forests of Southeast Asia. Their limbs are adapted for climbing trees.
Figure: white-cheeked gibbon. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp... | Look at the picture of the white-cheeked gibbon.
The white-cheeked gibbon uses its long limbs to reach branches while climbing. It uses its fingers and toes to grab the branches.
Now look at each animal. Figure out which animal has a similar adaptation.
The chimpanzee has long, powerful limbs. Its limbs are adapted for... |
train/639 | Select the chemical formula for this molecule. | [
"CH4",
"CH",
"ClH4",
"H"
] | 0 | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Match chemical formulas to ball-and-stick models | Every substance around you is made up of atoms. Atoms can link together to form molecules. The links between atoms in a molecule are called chemical bonds. Different molecules are made up of different chemical elements, or types of atoms, bonded together.
Scientists use both ball-and-stick models and chemical formulas ... | C is the symbol for carbon. H is the symbol for hydrogen. This ball-and-stick model shows a molecule with one carbon atom and four hydrogen atoms.
The chemical formula will contain the symbols C and H. There is one carbon atom, so C will not have a subscript. There are four hydrogen atoms, so H will have a subscript of... | |
train/640 | Is an antler a mineral? | [
"no",
"yes"
] | 0 | An antler has the following properties:
not a pure substance
naturally occurring
solid
body part of a deer
no fixed crystal structure | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | An antler does not have all the properties of a mineral. So, an antler is not a mineral. |
train/641 | Identify the question that Greta's experiment can best answer. | [
"Do circuits that include iron produce dimmer light than circuits that include copper?",
"Can light bulbs stay lit longer when circuits include copper or when circuits include iron?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Greta built an electric circuit: she used wires to connect a battery to a light bulb, the light bulb to a small piece of copper, and the copper back to the battery. When the circuit was complete, the light turned on. Gr... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/642 | What is the capital of Oregon? | [
"Portland",
"Salem",
"Tulsa",
"Honolulu"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. | ||
train/643 | Which statement describes the Steigerwald Forest ecosystem? | [
"It has many different types of trees.",
"It has only a few types of trees.",
"It has soil that is poor in nutrients."
] | 1 | Figure: Steigerwald Forest.
The Steigerwald Forest is a temperate deciduous forest ecosystem in Bavaria, a state in southern Germany. This forest has many oak and beech trees. | closed choice | grade8 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A temperate deciduous forest is a type of ecosystem. Temperate deciduous forests have the following features: warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees. So, the following statement describes the Steigerwald Forest ecosystem: warm, wet summers and cold, wet wi... |
train/644 | Select the fish below. | [
"keel-billed toucan",
"goldfish"
] | 1 | Fish live underwater. They have fins, not limbs. A clownfish is an example of a fish. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A keel-billed toucan is a bird. It has feathers, two wings, and a beak.
A goldfish is a fish. It lives underwater. It has fins, not limbs. |
train/645 | Which material is this toilet plunger made of? | [
"linen",
"rubber"
] | 1 | closed choice | grade2 | natural science | physics | Materials | Identify multiple materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Some objects are made of just one material.
Most nails are made of metal.
Other objects are made of more than one material.
This hammer is made of metal and wood. | Look at the picture of the toilet plunger.
The toilet plunger is made of two different materials. The handle is made of wood, and the head is made of rubber.
Rubber is a good material for a toilet plunger because it is flexible. The plunger can bend to the shape of the toilet. | |
train/646 | Select the organism in the same genus as the Andean gull. | [
"Larus livens",
"Chroicocephalus serranus",
"Larus michahellis"
] | 1 | This organism is an Andean gull. Its scientific name is Chroicocephalus serranus. | closed choice | grade6 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | An Andean gull's scientific name is Chroicocephalus serranus. The first word of its scientific name is Chroicocephalus.
Larus livens is in the genus Larus. The first word of its scientific name is Larus. So, Larus livens and Chroicocephalus serranus are not in the same genus.
Larus michahellis is in the genus Larus. Th... |
train/647 | Which of the following fossils is older? Select the more likely answer. | [
"mammal tooth",
"ginkgo leaf"
] | 0 | This diagram shows fossils in an undisturbed sedimentary rock sequence. | closed choice | grade8 | natural science | earth-science | Fossils | Compare ages of fossils in a rock sequence | A fossil is the preserved evidence of an ancient organism. Some fossils are formed from body parts such as bones or shells. Other fossils, such as footprints or burrows, are formed from traces of an organism's activities.
Fossils are typically found in sedimentary rocks. Sedimentary rocks usually form in layers. Over t... | Look again at the fossils in the rock sequence diagram.
Compare the positions of these fossils to determine which one is older:
The mammal tooth fossil is in a deeper layer in the rock sequence than the ginkgo leaf fossil. So, the mammal tooth fossil is most likely older than the ginkgo leaf fossil. |
train/648 | Which of these cities is marked on the map? | [
"Chicago",
"Cleveland",
"Indianapolis",
"St. Louis"
] | 1 | closed choice | grade5 | social science | geography | Cities | Cities of the Midwest | The city is Cleveland, Ohio. Chicago, Indianapolis, and St. Louis are marked with gray circles on the map below. | ||
train/649 | Complete the statement.
Ruthenium is (). | [
"an elementary substance",
"a compound"
] | 0 | The model below represents ruthenium. thenium is a metal that is often used in the tips of fountain pens. | closed choice | grade8 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | Use the model to determine whether ruthenium is an elementary substance or a compound.
Step 1: Interpret the model.
In the space-filling model shown above, all of the balls are the same color:
. The legend shows that dark blue represents the chemical element with the atomic symbol Ru. So, the model shows you that ruthe... |
train/650 | Which of the following could Miranda's test show? | [
"how much the new turbine would weigh",
"if the new turbine could turn easily",
"whether the new turbine could produce 10% more electricity"
] | 2 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade8 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/651 | Is shale a mineral? | [
"yes",
"no"
] | 1 | Shale has the following properties:
naturally occurring
not a pure substance
not made by organisms
no fixed crystal structure
solid | yes or no | grade5 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Shale does not have all the properties of a mineral. So, shale is not a mineral. |
train/652 | Identify the question that Victoria's experiment can best answer. | [
"Do circuits that include iron produce dimmer light than circuits that include copper?",
"Can light bulbs stay lit longer when circuits include copper or when circuits include iron?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Victoria built an electric circuit: she used wires to connect a battery to a light bulb, the light bulb to a small piece of copper, and the copper back to the battery. When the circuit was complete, the light turned on.... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/653 | Select the bird below. | [
"American alligator",
"white stork"
] | 1 | Birds have feathers, two wings, and a beak. An ostrich is an example of a bird. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | An American alligator is a reptile. It has scaly, waterproof skin.
A white stork is a bird. It has feathers, two wings, and a beak. |
train/654 | Which of these states is farthest east? | [
"Indiana",
"Iowa",
"South Carolina",
"Arizona"
] | 2 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. South Carolina is farthest east. | |
train/655 | Which trait does this red squirrel have? | [
"It has a bushy tail.",
"It has fins."
] | 0 | This image shows a Eurasian red squirrel. | closed choice | grade2 | natural science | literacy-in-science | Animals | Seed disperser: Eurasian red squirrel | ||
train/656 | What is this lanternshark's scientific name? | [
"Etmopterus benchleyi",
"Etmopterus decacuspidatus"
] | 0 | This species of lanternshark was discovered in the eastern Pacific Ocean in 2015. It was named after Peter Benchley, the author of the novel Jaws. | closed choice | grade4 | natural science | biology | Scientific names | Origins of scientific names | When a scientist identifies a new organism, he or she chooses its scientific name.
Sometimes, an organism is named after the place where it was first found. Other times, an organism is named after the scientist who first identified it. Or, the scientific name might describe the organism's physical traits.
Many of the w... | This organism's scientific name refers to Peter Benchley.
The word benchleyi refers to Peter Benchley. So, this lanternshark's scientific name is Etmopterus benchleyi. |
train/657 | Which solution has a higher concentration of green particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each green ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... |
train/658 | Which country is highlighted? | [
"Cuba",
"Saint Lucia",
"Saint Kitts and Nevis",
"Antigua and Barbuda"
] | 2 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Kitts and Nevis. | ||
train/659 | What is the capital of South Dakota? | [
"Pierre",
"Hartford",
"Sioux Falls",
"Rapid City"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | ||
train/660 | Which continent is highlighted? | [
"North America",
"Europe",
"Africa",
"Antarctica"
] | 3 | closed choice | grade3 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Antarctica. | |
train/661 | Which country is highlighted? | [
"Tonga",
"Vanuatu",
"Solomon Islands",
"Fiji"
] | 3 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Fiji. | ||
train/662 | Which solution has a higher concentration of purple particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each purple ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container.
Use the concentration formula to find the number of purple particles per mill... |
train/663 | What can Damon and Bert trade to each get what they want? | [
"Bert can trade his broccoli for Damon's oranges.",
"Damon can trade his tomatoes for Bert's sandwich.",
"Damon can trade his tomatoes for Bert's broccoli.",
"Bert can trade his almonds for Damon's tomatoes."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Damon and Bert open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Damon wanted bro... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Damon wanted broccoli in his lunch and Bert was hoping for tomatoes. Look at the labeled part of the images.
Damon has tomatoes. Bert has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want. | |
train/664 | Which better describes the Mount Rainier National Park ecosystem? | [
"It has long, cold winters. It also has soil that is poor in nutrients.",
"It has mostly small plants. It also has soil that is frozen year-round."
] | 0 | Figure: Mount Rainier National Park.
Mount Rainier National Park is a taiga ecosystem in Washington State. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A taiga is a type of ecosystem. Taigas have the following features: long, cold winters and short, cool summers, many evergreen trees, and soil that is poor in nutrients. So, Mount Rainier National Park has long, cold winters. It also has soil that is poor in nutrients. |
train/665 | Which of these states is farthest north? | [
"Oregon",
"Utah",
"Louisiana",
"Georgia"
] | 0 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Oregon is farthest north. | |
train/666 | What is the capital of Indiana? | [
"Saint Paul",
"Indianapolis",
"Jackson",
"Fort Wayne"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Indianapolis is the capital of Indiana. | ||
train/667 | Which country is highlighted? | [
"Haiti",
"the Dominican Republic",
"Jamaica",
"Cuba"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Haiti.
Does Haiti have any territorial disputes?
Haiti claims to own Navassa Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
Navassa Island is also claimed by the United States. The United States claimed the island in 18... | ||
train/668 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/669 | What is the capital of Colorado? | [
"Boise",
"Olympia",
"Denver",
"Colorado Springs"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Denver is the capital of Colorado. | ||
train/670 | What is the capital of Oregon? | [
"Salem",
"Phoenix",
"Wichita",
"Salt Lake City"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. | ||
train/671 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 1 | Figure: Guam.
Guam is an island in the Pacific Ocean. It often experiences months of low pressure during the rainy season each year.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Guam is an island in the Pacific Ocean. It often experiences months of low pressure during the rainy season each year.
The underlined part of the passage tells you about the usual pattern of barometric pressure during the rainy season in Guam. This passage does not describe what the weather ... |
train/672 | Which continent is highlighted? | [
"Antarctica",
"Africa",
"Europe"
] | 2 | closed choice | grade2 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Europe. | |
train/673 | Which rhetorical appeal is primarily used in this ad? | [
"pathos (emotion)",
"ethos (character)",
"logos (reason)"
] | 0 | closed choice | grade12 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals.
Appeals to ethos, or character, show the writer or speaker as trustworthy, authoritative, or sharing important values with the audience. An ad that appe... | The ad appeals to pathos, or emotion, by associating the product with feelings of ease and freedom from embarrassment. | |
train/674 | What can Monica and Troy trade to each get what they want? | [
"Monica can trade her tomatoes for Troy's broccoli.",
"Troy can trade his almonds for Monica's tomatoes.",
"Troy can trade his broccoli for Monica's oranges.",
"Monica can trade her tomatoes for Troy's sandwich."
] | 0 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Monica and Troy open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Monica wanted b... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Monica wanted broccoli in her lunch and Troy was hoping for tomatoes. Look at the labeled part of the images.
Monica has tomatoes. Troy has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want. | |
train/675 | What is the capital of Utah? | [
"Phoenix",
"Provo",
"Juneau",
"Salt Lake City"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | ||
train/676 | Is an eggshell a mineral? | [
"no",
"yes"
] | 0 | An eggshell has the following properties:
crystal structure is rarely fixed
not a pure substance
made by an animal
solid
found in nature | yes or no | grade5 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | An eggshell does not have all the properties of a mineral. So, an eggshell is not a mineral. |
train/677 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 2."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magnitude of the magnetic force between them is smaller.
There is a greater distance between the magnets in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is smaller in Pair 1 than in Pair 2. |
train/678 | Which of the following was a dependent variable in this experiment? | [
"the temperature at the hill",
"the distance the sled traveled across the flat field"
] | 1 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Sanjay heard that when it was cold outside, a sled would travel farther after it got to the bottom of a hill. To test this idea, Sanjay headed to the sledding hill near his house on a cold winter morning.
When... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify independent and dependent variables | Experiments have variables, or parts that change. You can design an experiment to find out how one variable affects another variable. For example, imagine that you want to find out if fertilizer affects the number of tomatoes a tomato plant grows. To answer this question, you decide to set up two equal groups of tomato... | |
train/679 | Is silicon a mineral? | [
"yes",
"no"
] | 1 | Silicon has the following properties:
pure substance
solid
fixed crystal structure
made in a factory | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | To make pure silicon, the substances in these compounds must be separated from each other. This can be done by heating the compounds to very high temperatures in a special oven called an electric arc furnace. |
train/680 | Which property do these two objects have in common? | [
"breakable",
"smooth"
] | 1 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A breakable object will break into pieces if you drop it. The car bumper is not breakable.
A smooth object is not scratchy or rough. Both objects are smooth.
The property that both objects have in common is smooth. |
train/681 | Which continent is highlighted? | [
"Africa",
"Antarctica",
"South America",
"Europe"
] | 2 | closed choice | grade6 | social science | geography | Physical Geography | Oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is South America. | |
train/682 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample A have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average kinetic energy, sampl... |
train/683 | Which type of force from the tow truck moves the car down the road? | [
"push",
"pull"
] | 1 | Tow trucks can move cars from one place to another. This tow truck applies a force to a car to move it down the road. | closed choice | grade3 | natural science | physics | Force and motion | Identify pushes and pulls | A force is a push or a pull that one object applies to a second object.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The tow truck applies a force to the car. This force moves the car down the road. The direction of this force is toward the tow truck. This force is a pull. |
train/684 | What is the name of the colony shown? | [
"North Carolina",
"Washington, D.C.",
"Iowa",
"Maryland"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/685 | What is the capital of Wyoming? | [
"Albuquerque",
"Cheyenne",
"Olympia",
"Madison"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | ||
train/686 | Which of these states is farthest north? | [
"West Virginia",
"New Mexico",
"South Carolina",
"Louisiana"
] | 0 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. West Virginia is farthest north. | |
train/687 | Which of these continents does the prime meridian intersect? | [
"Australia",
"Europe",
"North America"
] | 1 | closed choice | grade5 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects Europe. It does not intersect Australia or North America. | |
train/688 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is stronger in Pair 2.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger.
The magnets in Pair 1 are closer together than the magnets in Pair 2. So, the magnetic force is stronger in Pair 1 than in Pair 2. |
train/689 | Which continent was involved in the Seven Years' War? | [
"Australia",
"Europe"
] | 1 | The French and Indian War took place in North America in the 1750s and 1760s. That war was part of a much larger conflict known as the Seven Years' War. The map below highlights the countries and territories that fought in the Seven Years' War. Use the map to answer the question below. | closed choice | grade8 | social science | us-history | The American Revolution | Causes of the American Revolution: the French and Indian War | Look at the map.
The map shows that the conflict involved countries and territories throughout South America, Africa, North America, Asia, and Europe. The only continents not involved were Australia, where no Europeans had settled, and Antarctica, where no humans lived.
The French and Indian War was part of a global wa... | |
train/690 | Which animal is also adapted to be camouflaged among green leaves? | [
"green mantis",
"Namaqua chameleon"
] | 0 | Leaf insects live in the forests of Asia and Australia. The is adapted to be camouflaged among green leaves.
Figure: leaf insect. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the leaf insect.
The leaf insect has a green leaf-shaped body. It is adapted to be camouflaged among green leaves. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
The green mantis has a green body. It is adapted to be camouflaged a... |
train/691 | Select the fish below. | [
"tortoise",
"ostrich",
"piranha",
"African bullfrog"
] | 2 | Fish live underwater. They have fins, not limbs.
Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A bull shark is an example of a fish. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | An African bullfrog is an amphibian. It has moist skin and begins its life in water.
Frogs live near water or in damp places. Most frogs lay their eggs in water.
A piranha is a fish. It lives underwater. It has fins, not limbs.
Piranhas have sharp teeth. Piranhas hunt in groups. A group of piranhas can eat a large anim... |
train/692 | What is the capital of Wisconsin? | [
"Columbus",
"Milwaukee",
"Madison",
"Green Bay"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Madison is the capital of Wisconsin. | ||
train/693 | What is the capital of Louisiana? | [
"Baton Rouge",
"New Orleans",
"Richmond",
"Jefferson City"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Baton Rouge is the capital of Louisiana. | ||
train/694 | Which country is highlighted? | [
"Saint Vincent and the Grenadines",
"Jamaica",
"Saint Lucia",
"Grenada"
] | 2 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Lucia. | ||
train/695 | Which country is highlighted? | [
"Tonga",
"Tuvalu",
"Vanuatu",
"Fiji"
] | 0 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Tonga. | ||
train/696 | Which of these states is farthest north? | [
"Wyoming",
"Arkansas",
"Pennsylvania",
"Minnesota"
] | 3 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Minnesota is farthest north. | |
train/697 | Which of these states is farthest south? | [
"Utah",
"New Hampshire",
"New York",
"Minnesota"
] | 0 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the south arrow is pointing. Utah is farthest south. | |
train/698 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"neither; the samples have the same temperature"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample B have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sampl... |
train/699 | Is the following statement about our solar system true or false?
The volume of Saturn is more than ten times the volume of Uranus. | [
"false",
"true"
] | 1 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To determine if this statement is true, calculate the value of ten times the volume of Uranus.
Then compare the result to the volume of Saturn. The volume of Saturn is 8.27 x 10^14 km^3, which is greater than 6.83 x 10^14 km^3. So, the volume of Saturn is more than ten times the volume of Uranus. |
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